/*
 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */
package java.security.spec;

import java.math.BigInteger;

/**
 * This immutable class specifies an elliptic curve private key with
 * its associated parameters.
 *
 * @author Valerie Peng
 * @see KeySpec
 * @see ECParameterSpec
 * @since 1.5
 */
public class ECPrivateKeySpec implements KeySpec {

  private BigInteger s;
  private ECParameterSpec params;

  /**
   * Creates a new ECPrivateKeySpec with the specified
   * parameter values.
   *
   * @param s the private value.
   * @param params the associated elliptic curve domain parameters.
   * @throws NullPointerException if {@code s} or {@code params} is null.
   */
  public ECPrivateKeySpec(BigInteger s, ECParameterSpec params) {
    if (s == null) {
      throw new NullPointerException("s is null");
    }
    if (params == null) {
      throw new NullPointerException("params is null");
    }
    this.s = s;
    this.params = params;
  }

  /**
   * Returns the private value S.
   *
   * @return the private value S.
   */
  public BigInteger getS() {
    return s;
  }

  /**
   * Returns the associated elliptic curve domain
   * parameters.
   *
   * @return the EC domain parameters.
   */
  public ECParameterSpec getParams() {
    return params;
  }
}
